#!/bin/bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -e

if ((NO_BUILD)); then
    exit 0
fi

# shellcheck source=/dev/null
. /usr/lib/os-release
ID="${ID%-*}"

if [ ! -f "pkg/$ID/systemd.spec" ]; then
    echo "spec not found at pkg/$ID/systemd.spec, run mkosi once with -ff to make sure the spec is cloned" >&2
    exit 1
fi

if [ -d .git/ ] && [ -z "$(git status --porcelain)" ]; then
    TS="$(git show --no-patch --format=%ct HEAD)"
else
    TS="${SOURCE_DATE_EPOCH:-$(date +%s)}"
fi

# The openSUSE filelists hardcode the manpage compression extension. This causes rpmbuild errors since we
# disable manpage compression as the files cannot be found. Fix the issue by removing the compression
# extension.
find "pkg/$ID" -name "files.*" -exec sed --in-place 's/\.gz$//' {} \;

if systemd-analyze compare-versions "$(rpm --version | cut -d ' ' -f3)" lt "4.20"; then
    # Fix the %install override so debuginfo packages are generated.
    tee --append /usr/lib/rpm/suse/macros <<'EOF'
%install %{debug_package}\
%%install\
%{nil}
EOF
fi

VERSION="$(cat meson.version)"
RELEASE="$(date "+%Y%m%d%H%M%S" --date "@$TS")"

DIST="$(rpm --eval %dist)"
ARCH="$(rpm --eval %_arch)"
SRCDEST="/usr/src/debug/systemd-$VERSION-${RELEASE}${DIST}.$ARCH"

MKOSI_CFLAGS="-O0 -Wp,-U_FORTIFY_SOURCE"
if ((WITH_DEBUG)); then
    MKOSI_CFLAGS="$MKOSI_CFLAGS -fdebug-prefix-map=../src=$SRCDEST"
fi
if ((LLVM)); then
    # TODO: Remove -fno-sanitize-function when https://github.com/systemd/systemd/issues/29972 is fixed.
    MKOSI_CFLAGS="$MKOSI_CFLAGS -shared-libasan -fno-sanitize=function"
fi

MKOSI_LDFLAGS="$(rpm --eval "%{?build_ldflags}")"
if ((LLVM)) && [[ -n "$SANITIZERS" ]]; then
    MKOSI_LDFLAGS="$MKOSI_LDFLAGS -Wl,-rpath=$(clang --print-file-name="")lib/linux"
fi

# A macro can't have an empty body and currently opensuse does not specify any of its own linker flags so
# set LDFLAGS to %{nil} if there are no linker flags.
if [[ -z "${MKOSI_LDFLAGS// }" ]]; then
    MKOSI_LDFLAGS="%{nil}"
fi

MKOSI_MESON_OPTIONS="-D mode=developer -D b_sanitize=${SANITIZERS:-none}"
if ((WIPE)); then
    MKOSI_MESON_OPTIONS="$MKOSI_MESON_OPTIONS --wipe"
fi

build() {
    IFS=
    # shellcheck disable=SC2046
    env \
    --unset CFLAGS \
    --unset CXXFLAGS \
    --unset LDFLAGS \
    CC="$( ((LLVM)) && echo clang || echo gcc)" \
    CXX="$( ((LLVM)) && echo clang++ || echo g++)" \
    CC_LD="$( ((LLVM)) && echo lld)" \
    CXX_LD="$( ((LLVM)) && echo lld)" \
    rpmbuild \
        -bb \
        --build-in-place \
        --with upstream \
        $( ((WITH_TESTS)) || echo "--nocheck") \
        --define "_topdir /var/tmp" \
        --define "_sourcedir pkg/$ID" \
        --define "_rpmdir $OUTPUTDIR" \
        ${BUILDDIR:+"--define=_vpath_builddir $BUILDDIR"} \
        --define "_build_name_fmt %%{NAME}-%%{VERSION}-%%{RELEASE}.%%{ARCH}.rpm" \
        --define "_binary_payload w.ufdio" \
        $( ((WITH_DEBUG)) || echo "--define=debug_package %{nil}") \
        --define "vendor openSUSE" \
        --define "version_override $VERSION" \
        --define "release_override $RELEASE" \
        --define "__check_files sh -c '$(rpm --define "_topdir /var/tmp" --eval %__check_files) | tee /tmp/unpackaged-files'" \
        --define "build_cflags $(rpm --eval "%{?build_cflags}") $MKOSI_CFLAGS $CFLAGS" \
        --define "build_cxxflags $(rpm --eval "%{?build_cxxflags}") $MKOSI_CFLAGS $CFLAGS" \
        --define "build_ldflags $MKOSI_LDFLAGS $LDFLAGS" \
        $( ((MESON_VERBOSE)) || echo "--undefine=__meson_verbose") \
        --define "meson_extra_configure_options $MKOSI_MESON_OPTIONS $MESON_OPTIONS" \
        --define "__os_install_post /usr/lib/rpm/brp-suse %{nil}" \
        --define "__elf_exclude_path ^/usr/lib/systemd/tests/unit-tests/.*$" \
        --define "__script_requires %{nil}" \
        --define "_find_debuginfo_dwz_opts %{nil}" \
        --define "_fixperms true" \
        --noclean \
        "$@" \
        "pkg/$ID/systemd.spec"

    EXIT_STATUS=$?

    # Make sure we don't reconfigure twice.
    MKOSI_MESON_OPTIONS="${MKOSI_MESON_OPTIONS//"--wipe"/}"

    return $EXIT_STATUS
}

if ! build; then
    if [ ! -s /tmp/unpackaged-files ]; then
        exit 1
    fi

    # rpm will append to any existing systemd.lang so delete it explicitly so we don't get duplicate file
    # warnings.
    rm systemd.lang

    grep -v ".debug" /tmp/unpackaged-files >>"pkg/$ID/files.systemd"
    build --noprep --nocheck
fi

cp "$OUTPUTDIR"/*.rpm "$PACKAGEDIR"
